US6338768B1 - Method for manufacturing a shoe insole - Google Patents

Method for manufacturing a shoe insole Download PDF

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Publication number
US6338768B1
US6338768B1 US09/611,883 US61188300A US6338768B1 US 6338768 B1 US6338768 B1 US 6338768B1 US 61188300 A US61188300 A US 61188300A US 6338768 B1 US6338768 B1 US 6338768B1
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Prior art keywords
shoe insole
thermoplastic material
plastic plate
plate structure
support portion
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US09/611,883
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Cheng-Te Chi
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    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/14—Soles; Sole-and-heel integral units characterised by the constructive form
    • A43B13/18—Resilient soles
    • A43B13/187—Resiliency achieved by the features of the material, e.g. foam, non liquid materials
    • A43B13/188—Differential cushioning regions
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/38—Built-in insoles joined to uppers during the manufacturing process, e.g. structural insoles; Insoles glued to shoes during the manufacturing process
    • A43B13/383—Built-in insoles joined to uppers during the manufacturing process, e.g. structural insoles; Insoles glued to shoes during the manufacturing process pieced
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0013—Extrusion moulding in several steps, i.e. components merging outside the die
    • B29C48/0014—Extrusion moulding in several steps, i.e. components merging outside the die producing flat articles having components brought in contact outside the extrusion die
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D35/00—Producing footwear
    • B29D35/12—Producing parts thereof, e.g. soles, heels, uppers, by a moulding technique
    • B29D35/14—Multilayered parts
    • B29D35/142—Soles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2009/00—Layered products
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/108—Flash, trim or excess removal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1084—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing of continuous or running length bonded web

Definitions

  • the present invention relates to a method for manufacturing a shoe insole.
  • a conventional shoe sole in accordance with the prior art is made of stiff abrasion resistant material, and a shoe insole together with a soft shoe pad is coated on the top face of the rigid shoe sole.
  • the conventional shoe insole is a buffer pad so that it cannot be adapted to reinforce the structural strength of the heel portion of the shoe sole, thereby limiting the versatility of the shoe insole.
  • the present invention has arisen to mitigate and/or obviate the disadvantage of the conventional shoe insole.
  • a method for manufacturing a shoe insole comprising the steps of: conveying high density thermoplastic material and low density thermoplastic material through two feed pipes respectively into a heated pressing machine in a spiral manner, when the fused high density thermoplastic material and the fused low density thermoplastic material are conveyed through a mold head of the pressing machine, the fused high density thermoplastic material and the fused low density thermoplastic material are heated and pressed to bond with each other to form an elongated flat dual density plastic plate structure, the elongated flat dual density plastic plate structure is then rolled by rollers of a rolling machine so as to fit a thickness of a shoe insole, a non-woven fabric is then adhered on a top face and a bottom face of the elongated flat dual density plastic plate structure, the elongated flat dual density plastic plate structure together with the non-woven fabric is then rolled and flattened by rollers of a rolling machine, the elongated flat dual density plastic plate structure is then cut by a
  • the rear heel support portion of the shoe insole product has a periphery integrally molded with an arcuate curved surface.
  • a method for manufacturing a shoe insole comprising the steps of: conveying low density thermoplastic material through a feed pipe into a heated pressing machine in a spiral manner, the low density thermoplastic material is rolled through the pressing machine to be heated and pressed by the pressing machine so as to form a wedge-shaped plastic plate structure, a non-woven fabric is then adhered on a top face and a bottom face of the wedge-shaped plastic plate structure, the wedge-shaped plastic plate structure is then cut by a cutting machine into a plurality of wedge-shaped shoe insole blanks, and each of the wedge-shaped shoe insole blanks is then heated and pressed by a heat forming mold to form a shoe insole product which includes a rear heel support portion having a greater thickness and a front sole support portion having a smaller thickness.
  • the rear heel support portion of the shoe insole product has a periphery integrally molded with an arcuate curved surface.
  • FIG. 1 is a flow chart of a method for manufacturing a shoe insole in accordance with the invention
  • FIG. 2 is a cross-sectional view of a pressing machine for performing the method as shown FIG. 1;
  • FIG. 3 is a perspective view of an elongated flat dual density plastic plate structure in accordance with the present invention.
  • FIG. 4 is a perspective view of a shoe insole in accordance with the present invention.
  • FIG. 5 is a side plan cross-sectional view of the shoe insole as shown in FIG. 4;
  • FIG. 6 is a flow chart of a method for manufacturing a shoe insole in accordance with another embodiment of the present invention.
  • FIG. 7 is a perspective view of a wedge-shaped plastic plate structure in accordance with the present invention.
  • FIG. 8 is a side plan cross-sectional view of the wedge-shaped plastic plate as shown in FIG. 7;
  • FIG. 9 is a side plan cross-sectional view of a shoe insole in accordance with the present invention.
  • a method for manufacturing a shoe insole 40 in accordance with the present invention comprises the steps described as follows.
  • thermoplastic material “A” and low density thermoplastic material “B” are respectively conveyed through two feed pipes 1 and 2 into a heated pressing machine in a spiral manner.
  • the fused high density thermoplastic material and “A” the fused low density thermoplastic material “B” are conveyed through the mold head 3 of the pressing machine, the fused high density thermoplastic material “A” and the fused low density thermoplastic material “B” are heated and pressed to bond with each other to form an elongated flat dual density plastic plate structure 10 as shown in FIG. 2 which has two distinct layers “A” and “B”.
  • the elongated flat dual density plastic plate structure 10 is then rolled by rollers of a rolling machine so as to fit a thickness of a shoe insole 40 .
  • a non-woven fabric 20 is then adhered on the top face and the bottom face of the elongated flat dual density plastic plate structure 10 .
  • the elongated flat dual density plastic plate structure 10 together with the non-woven fabric 20 is then rolled and flattened by rollers of a rolling machine.
  • the elongated flat dual density plastic plate structure 10 is then cut by a cutting machine into a plurality of dual density shoe insole blanks 30 as shown in FIG. 3 .
  • Each of the dual density shoe insole blanks 30 is then heated and pressed by a heat forming mold to form a shoe insole product 40 as shown in FIG. 4 which includes a rear heel support portion 41 made of the high density thermoplastic material “A” and a front sole support portion 42 made of the low density thermoplastic material “B”.
  • the rear heel support portion 41 of the shoe insole product 40 has a periphery integrally molded with an arcuate curved surface 411 as shown in FIG. 5 so that the rear heel support portion 41 of the shoe insole product 40 can be adapted to efficiently fit the size of the user's heel, thereby enhancing the comfort of the shoe insole product 40 .
  • the rear heel support portion 41 and the front sole support portion 42 of the shoe insole 40 are integrally formed by two thermoplastic materials of different densities by means of the heated and pressed process.
  • the rear heel support portion 41 of the shoe insole 40 is made of the high density thermoplastic material “A” so that the rear heel support portion 41 of the shoe insole 40 is rigid and will not easily deform, thereby increasing and reinforcing the structural strength of the shoe insole 40 and the shoe sole so that the shoe sole will not be distorted and deformed due to bearing stresses.
  • the front sole support portion 42 of the shoe insole 40 is made of the low density thermoplastic material “B” so that the front sole support portion 42 of the shoe insole 40 can be properly distorted and deformed so as to fit the size of the user's sole, thereby enhancing the comfort of the shoe insole.
  • a method for manufacturing a shoe insole 70 in accordance with another embodiment of the present invention comprises the steps described as follows.
  • a low density thermoplastic material “B” is conveyed through a feed pipe into a heated pressing machine in a spiral manner. Then, the low density thermoplastic material “B” is rolled through the pressing machine to be heated and pressed by the pressing machine so as to form a wedge-shaped plastic plate structure 50 as shown in FIG. 7.
  • a non-woven fabric 20 is then adhered on the top face and the bottom face of the wedge-shaped plastic plate structure 20 as shown in FIG. 8 .
  • the wedge-shaped plastic plate structure 50 is then cut by a cutting machine into a plurality of wedge-shaped shoe insole blanks 60 . Each of the wedge-shaped shoe insole blanks 60 is then heated and pressed by a heat forming mold to form a shoe insole product 70 as shown in FIG. 9 which includes a rear heel support portion 71 having a greater thickness and a front sole support portion 72 having a smaller thickness.
  • the rear heel support portion 71 of the shoe insole 70 has a periphery integrally molded with an arcuate curved surface 711 so that the rear heel support portion 71 of the shoe insole 70 can be adapted to efficiently fit the size of the user's heel, thereby enhancing the comfort of the shoe insole 70 .
  • the front sole support portion 72 of the shoe insole 70 is made of the low density thermoplastic material “B” so that the front sole support portion 72 of the shoe insole 70 can be properly distorted and deformed so as to fit the size of the user's sole, thereby enhancing the comfort of the shoe insole.
  • the rear heel support portion 71 of the shoe insole 70 is made of a thicker thermoplastic material so that the rear heel support portion 71 of the shoe insole 70 is rigid enough to increase and reinforce the structural strength of the shoe insole 70 and the shoe sole so that the shoe sole will not be distorted and deformed due to bearing stresses.
  • the high density thermoplastic material and the low density thermoplastic material are polyethylene, nylon, A.B.S. etc.
  • the high density thermoplastic material and the low density thermoplastic material are respectively conveyed by two feed pipes into a pressing machine to integrally form an elongated flat dual density plastic plate structure, or alternatively, in accordance with another embodiment of the present invention, the low density thermoplastic material is rolled through a pressing machine to be heated and pressed by the pressing machine so as to form a wedge-shaped plastic plate structure. Then, the plastic plate structure can be largely and rapidly cut into a plurality of shoe insole blanks, and each of the shoe insole blanks is then heated and pressed by a heat forming mold so as to form a shoe insole product which includes a rear heel support portion and a front sole support portion.
  • the method in accordance with the present invention can be adapted to simplify the steps and procedures for making a shoe insole, and to increase the productivity and quality of the shoe insole, thereby decreasing the cost of fabrication.

Abstract

A method is provided for manufacturing a shoe insole. First, high density thermoplastic material and low density thermoplastic material are conveyed through two feed pipes respectively into a heated pressing machine. When the high and low density thermoplastic materials are conveyed through a mold head of the pressing machine, they are heated and pressed to bond with each other to form an elongated flat dual density plastic plate structure which is then rolled by rollers of a rolling machine so as to fit the thickness of a shoe insole. A non-woven fabric is then adhered on a top face and a bottom face of the elongated flat dual density plastic plate structure which is then rolled and flattened by the rollers of a rolling machine, and is then cut by a cutting machine into a plurality of dual density shoe insole blanks, each of which is then heated and pressed by a heat forming mold so as to form a shoe insole product which includes a rear heel support portion made of the high density thermoplastic material and a front sole support portion made of the low density thermoplastic material.

Description

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a method for manufacturing a shoe insole.
2. Description of the Related Art
A conventional shoe sole in accordance with the prior art is made of stiff abrasion resistant material, and a shoe insole together with a soft shoe pad is coated on the top face of the rigid shoe sole. However, it is necessary to additionally provide an iron core member or fixing paper plate on the heel portion of the shoe sole for reinforcing the structural strength of the heel of the shoe, and for preventing the heel of the shoe from being distorted or deformed due to bearing a force, thereby complicating the construction of the shoe, and thereby greatly increasing the time and cost of fabrication or increasing the weight of the shoe. In addition, the conventional shoe insole is a buffer pad so that it cannot be adapted to reinforce the structural strength of the heel portion of the shoe sole, thereby limiting the versatility of the shoe insole.
SUMMARY OF THE INVENTION
The present invention has arisen to mitigate and/or obviate the disadvantage of the conventional shoe insole.
In accordance with one aspect of the present invention, there is provided a method for manufacturing a shoe insole comprising the steps of: conveying high density thermoplastic material and low density thermoplastic material through two feed pipes respectively into a heated pressing machine in a spiral manner, when the fused high density thermoplastic material and the fused low density thermoplastic material are conveyed through a mold head of the pressing machine, the fused high density thermoplastic material and the fused low density thermoplastic material are heated and pressed to bond with each other to form an elongated flat dual density plastic plate structure, the elongated flat dual density plastic plate structure is then rolled by rollers of a rolling machine so as to fit a thickness of a shoe insole, a non-woven fabric is then adhered on a top face and a bottom face of the elongated flat dual density plastic plate structure, the elongated flat dual density plastic plate structure together with the non-woven fabric is then rolled and flattened by rollers of a rolling machine, the elongated flat dual density plastic plate structure is then cut by a cutting machine into a plurality of dual density shoe insole blanks, and each of the dual density shoe insole blanks is then heated and pressed by a heat forming mold to form a shoe insole product which includes a rear heel support portion made of the high density thermoplastic material and a front sole support portion made of the low density thermoplastic material.
Preferably, the rear heel support portion of the shoe insole product has a periphery integrally molded with an arcuate curved surface.
In accordance with another aspect of the present invention, there is provided a method for manufacturing a shoe insole comprising the steps of: conveying low density thermoplastic material through a feed pipe into a heated pressing machine in a spiral manner, the low density thermoplastic material is rolled through the pressing machine to be heated and pressed by the pressing machine so as to form a wedge-shaped plastic plate structure, a non-woven fabric is then adhered on a top face and a bottom face of the wedge-shaped plastic plate structure, the wedge-shaped plastic plate structure is then cut by a cutting machine into a plurality of wedge-shaped shoe insole blanks, and each of the wedge-shaped shoe insole blanks is then heated and pressed by a heat forming mold to form a shoe insole product which includes a rear heel support portion having a greater thickness and a front sole support portion having a smaller thickness.
Preferably, the rear heel support portion of the shoe insole product has a periphery integrally molded with an arcuate curved surface.
Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a flow chart of a method for manufacturing a shoe insole in accordance with the invention;
FIG. 2 is a cross-sectional view of a pressing machine for performing the method as shown FIG. 1;
FIG. 3 is a perspective view of an elongated flat dual density plastic plate structure in accordance with the present invention;
FIG. 4 is a perspective view of a shoe insole in accordance with the present invention;
FIG. 5 is a side plan cross-sectional view of the shoe insole as shown in FIG. 4;
FIG. 6 is a flow chart of a method for manufacturing a shoe insole in accordance with another embodiment of the present invention;
FIG. 7 is a perspective view of a wedge-shaped plastic plate structure in accordance with the present invention;
FIG. 8 is a side plan cross-sectional view of the wedge-shaped plastic plate as shown in FIG. 7; and
FIG. 9 is a side plan cross-sectional view of a shoe insole in accordance with the present invention.
DETAILED DESCRIPTION OF THE INVENTION
Referring to the drawings and initially to FIGS. 1-5, a method for manufacturing a shoe insole 40 in accordance with the present invention comprises the steps described as follows.
First, high density thermoplastic material “A” and low density thermoplastic material “B” are respectively conveyed through two feed pipes 1 and 2 into a heated pressing machine in a spiral manner. When the fused high density thermoplastic material and “A” the fused low density thermoplastic material “B” are conveyed through the mold head 3 of the pressing machine, the fused high density thermoplastic material “A” and the fused low density thermoplastic material “B” are heated and pressed to bond with each other to form an elongated flat dual density plastic plate structure 10 as shown in FIG. 2 which has two distinct layers “A” and “B”. The elongated flat dual density plastic plate structure 10 is then rolled by rollers of a rolling machine so as to fit a thickness of a shoe insole 40. A non-woven fabric 20 is then adhered on the top face and the bottom face of the elongated flat dual density plastic plate structure 10. The elongated flat dual density plastic plate structure 10 together with the non-woven fabric 20 is then rolled and flattened by rollers of a rolling machine. The elongated flat dual density plastic plate structure 10 is then cut by a cutting machine into a plurality of dual density shoe insole blanks 30 as shown in FIG. 3. Each of the dual density shoe insole blanks 30 is then heated and pressed by a heat forming mold to form a shoe insole product 40 as shown in FIG. 4 which includes a rear heel support portion 41 made of the high density thermoplastic material “A” and a front sole support portion 42 made of the low density thermoplastic material “B”.
Preferably, the rear heel support portion 41 of the shoe insole product 40 has a periphery integrally molded with an arcuate curved surface 411 as shown in FIG. 5 so that the rear heel support portion 41 of the shoe insole product 40 can be adapted to efficiently fit the size of the user's heel, thereby enhancing the comfort of the shoe insole product 40.
According to the present invention, the rear heel support portion 41 and the front sole support portion 42 of the shoe insole 40 are integrally formed by two thermoplastic materials of different densities by means of the heated and pressed process.
The rear heel support portion 41 of the shoe insole 40 is made of the high density thermoplastic material “A” so that the rear heel support portion 41 of the shoe insole 40 is rigid and will not easily deform, thereby increasing and reinforcing the structural strength of the shoe insole 40 and the shoe sole so that the shoe sole will not be distorted and deformed due to bearing stresses. In addition, it is unnecessary to provide a conventional iron core member or fixing paper plate on the heel portion of the shoe sole.
On the other hand, the front sole support portion 42 of the shoe insole 40 is made of the low density thermoplastic material “B” so that the front sole support portion 42 of the shoe insole 40 can be properly distorted and deformed so as to fit the size of the user's sole, thereby enhancing the comfort of the shoe insole.
Referring to FIGS. 6-9, a method for manufacturing a shoe insole 70 in accordance with another embodiment of the present invention comprises the steps described as follows.
First, a low density thermoplastic material “B” is conveyed through a feed pipe into a heated pressing machine in a spiral manner. Then, the low density thermoplastic material “B” is rolled through the pressing machine to be heated and pressed by the pressing machine so as to form a wedge-shaped plastic plate structure 50 as shown in FIG. 7. A non-woven fabric 20 is then adhered on the top face and the bottom face of the wedge-shaped plastic plate structure 20 as shown in FIG. 8. The wedge-shaped plastic plate structure 50 is then cut by a cutting machine into a plurality of wedge-shaped shoe insole blanks 60. Each of the wedge-shaped shoe insole blanks 60 is then heated and pressed by a heat forming mold to form a shoe insole product 70 as shown in FIG. 9 which includes a rear heel support portion 71 having a greater thickness and a front sole support portion 72 having a smaller thickness.
Preferably, the rear heel support portion 71 of the shoe insole 70 has a periphery integrally molded with an arcuate curved surface 711 so that the rear heel support portion 71 of the shoe insole 70 can be adapted to efficiently fit the size of the user's heel, thereby enhancing the comfort of the shoe insole 70.
The front sole support portion 72 of the shoe insole 70 is made of the low density thermoplastic material “B” so that the front sole support portion 72 of the shoe insole 70 can be properly distorted and deformed so as to fit the size of the user's sole, thereby enhancing the comfort of the shoe insole.
On the other hand, the rear heel support portion 71 of the shoe insole 70 is made of a thicker thermoplastic material so that the rear heel support portion 71 of the shoe insole 70 is rigid enough to increase and reinforce the structural strength of the shoe insole 70 and the shoe sole so that the shoe sole will not be distorted and deformed due to bearing stresses.
It is appreciated that, the high density thermoplastic material and the low density thermoplastic material are polyethylene, nylon, A.B.S. etc.
Accordingly, in accordance with the present invention, the high density thermoplastic material and the low density thermoplastic material are respectively conveyed by two feed pipes into a pressing machine to integrally form an elongated flat dual density plastic plate structure, or alternatively, in accordance with another embodiment of the present invention, the low density thermoplastic material is rolled through a pressing machine to be heated and pressed by the pressing machine so as to form a wedge-shaped plastic plate structure. Then, the plastic plate structure can be largely and rapidly cut into a plurality of shoe insole blanks, and each of the shoe insole blanks is then heated and pressed by a heat forming mold so as to form a shoe insole product which includes a rear heel support portion and a front sole support portion.
Therefore, the method in accordance with the present invention can be adapted to simplify the steps and procedures for making a shoe insole, and to increase the productivity and quality of the shoe insole, thereby decreasing the cost of fabrication.
It should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.

Claims (2)

What is claimed is:
1. A method for manufacturing a shoe insole comprising the steps of:
conveying high density thermoplastic material and low density thermoplastic material through two feed pipes respectively into a heated pressing machine in a spiral manner,
when said fused high density thermoplastic material and said fused low density thermoplastic material are conveyed through a mold head of said pressing machine, said fused high density thermoplastic material and said fused low density thermoplastic material are heated and pressed to bond with each other to form an elongated flat dual density plastic plate structure,
said elongated flat dual density plastic plate structure is then rolled by rollers of a rolling machine so as to fit a thickness of a shoe insole,
a non-woven fabric is then adhered on a top face and a bottom face of said elongated flat dual density plastic plate structure,
said elongated flat dual density plastic plate structure together with said non-woven fabric is then rolled and flattened by rollers of a rolling machine,
said elongated flat dual density plastic plate structure is then cut by a cutting machine into a plurality of dual density shoe insole blanks, and
each of said dual density shoe insole blanks is then heated and pressed by a heat forming mold to form a shoe insole product which includes a rear heel support portion made of said high density thermoplastic material and a front sole support portion made of said low density thermoplastic material.
2. The method in accordance with claim 1, wherein said rear heel support portion of said shoe insole product has a periphery integrally molded with an arcuate curved surface.
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Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040134095A1 (en) * 2002-08-05 2004-07-15 Bray Walter Thomas Slipper insole, slipper, and method for manufacturing a slipper
US6792699B2 (en) 2002-09-09 2004-09-21 Royce Medical Company Low shear customized footgear
US20050202113A1 (en) * 2004-03-10 2005-09-15 Cheng-Te Chi Web bonded plastic sheet extruding system
US6990754B2 (en) 2002-08-05 2006-01-31 R. G. Barry Corporation Slipper insole, slipper, and method for manufacturing a slipper
US20060288611A1 (en) * 2005-06-27 2006-12-28 Hogan Patrick J Suspended orthotic shoe and methods of making same
US20070011831A1 (en) * 2005-07-18 2007-01-18 South Cone. Inc. Contoured insole construction and method of manufacturing same
US20070033835A1 (en) * 2005-08-02 2007-02-15 Bray Walter T Jr Insole arrangement; footwear with insole arrangement; and, method of preparation
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US20100122475A1 (en) * 2008-11-20 2010-05-20 3M Innovative Properties Company Molded insulated shoe footbed and method of making an insulated footbed
US20100186134A1 (en) * 2009-01-29 2010-07-29 Variloft, Llc Thermal regulating and load bearing inserts for wearable and related items
US20110094046A1 (en) * 2009-10-28 2011-04-28 Vibram Sp.A. Forming a shoe component with rocker bottom
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ITPD20120285A1 (en) * 2012-10-02 2014-04-03 Insole Srl PROCESS OF PRODUCTION OF A STIFF WITH A STIFFNESS DIFFERENTIATED FOR FOOTWEAR, PARTICULARLY FOR OPEN FOOTWEAR SUCH AS SANDALS AND SIMILAR, AND THE INSOLE SOON OBTAINED
KR101402361B1 (en) * 2012-01-05 2014-06-02 김인규 The multiple facility shoes in-sole foam preform making method besides
ES2525404A1 (en) * 2013-06-20 2014-12-22 Analco Auxiliar Calzado, S.A. Template for footwear and its manufacturing process (Machine-translation by Google Translate, not legally binding)
US9333106B2 (en) 2008-05-15 2016-05-10 Ossur Hf Circumferential walker
USD772418S1 (en) 2014-03-27 2016-11-22 Ossur Hf Shell for an orthopedic device
US9560896B1 (en) 2014-02-12 2017-02-07 Soxsols, Llc Insole for footwear
US20170071292A1 (en) * 2015-09-15 2017-03-16 Pregis Innovative Packaging Llc Inflatable shoe insert
US20170095037A1 (en) * 2009-03-26 2017-04-06 Ronald James Stratten Weighted shoe insole and method for making the same
US9668907B2 (en) 2013-09-25 2017-06-06 Ossur Iceland Ehf Orthopedic device
US9744065B2 (en) 2013-09-25 2017-08-29 Ossur Hf Orthopedic device
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US8136266B2 (en) 2006-12-01 2012-03-20 Ariat International, Inc. Advanced torque stability footbed
US20080127517A1 (en) * 2006-12-01 2008-06-05 Ariat International, Inc. Advanced torque stability footbed
KR100824277B1 (en) 2007-10-02 2008-04-24 김치완 The method of making the middl sole of ashoe and it's sole of ashoe
US9883717B2 (en) 2007-10-23 2018-02-06 Nike, Inc. Articles and methods of manufacture of articles
US9795181B2 (en) 2007-10-23 2017-10-24 Nike, Inc. Articles and methods of manufacture of articles
US9788604B2 (en) 2007-10-23 2017-10-17 Nike, Inc. Articles and method of manufacture of articles
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US20100095557A1 (en) * 2007-10-23 2010-04-22 Nike, Inc. Articles And Methods Of Manufacture Of Articles
CN101255243B (en) * 2008-04-02 2010-04-14 际华三五一四制革制鞋有限公司 Double-density shoe leather fast curing rubber size suitable for injection technique and production method thereof
US10064749B2 (en) 2008-05-15 2018-09-04 Ossur Hf Circumferential walker
US9333106B2 (en) 2008-05-15 2016-05-10 Ossur Hf Circumferential walker
US9468553B2 (en) 2008-05-15 2016-10-18 Ossur Hf Circumferential walker
US9492301B2 (en) 2008-05-15 2016-11-15 Ossur Hf Circumferential walker
CN102215712B (en) * 2008-11-20 2013-07-24 3M创新有限公司 Molded insulated shoe footbed and method of making an insulated footbed
AU2009317926B2 (en) * 2008-11-20 2012-02-16 3M Innovative Properties Company Molded insulated shoe footbed and method of making an insulated footbed
US8069587B2 (en) 2008-11-20 2011-12-06 3M Innovative Properties Company Molded insulated shoe footbed and method of making an insulated footbed
WO2010059429A3 (en) * 2008-11-20 2010-08-12 3M Innovative Properties Company Molded insulated shoe footbed and method of making an insulated footbed
WO2010059429A2 (en) * 2008-11-20 2010-05-27 3M Innovative Properties Company Molded insulated shoe footbed and method of making an insulated footbed
US20100122475A1 (en) * 2008-11-20 2010-05-20 3M Innovative Properties Company Molded insulated shoe footbed and method of making an insulated footbed
US7926124B2 (en) * 2009-01-29 2011-04-19 Variloft, Llc Thermal regulating and load bearing inserts for wearable and related items
US20100186134A1 (en) * 2009-01-29 2010-07-29 Variloft, Llc Thermal regulating and load bearing inserts for wearable and related items
US20170095037A1 (en) * 2009-03-26 2017-04-06 Ronald James Stratten Weighted shoe insole and method for making the same
US20110094046A1 (en) * 2009-10-28 2011-04-28 Vibram Sp.A. Forming a shoe component with rocker bottom
FR2963540A1 (en) * 2010-08-06 2012-02-10 Raphael Young Sa SHOE WITH A MOUNTAIN FIRST COMPRISING A FRONT BOARD IN FLEXIBLE MATERIAL
KR101402361B1 (en) * 2012-01-05 2014-06-02 김인규 The multiple facility shoes in-sole foam preform making method besides
ITPD20120285A1 (en) * 2012-10-02 2014-04-03 Insole Srl PROCESS OF PRODUCTION OF A STIFF WITH A STIFFNESS DIFFERENTIATED FOR FOOTWEAR, PARTICULARLY FOR OPEN FOOTWEAR SUCH AS SANDALS AND SIMILAR, AND THE INSOLE SOON OBTAINED
US11425963B2 (en) 2013-03-14 2022-08-30 Under Armour, Inc. Shoe with lattice structure
US10575586B2 (en) 2013-03-14 2020-03-03 Under Armour, Inc. Shoe with lattice structure
US10470520B2 (en) 2013-03-14 2019-11-12 Under Armour, Inc. Shoe with lattice structure
US10470519B2 (en) 2013-03-14 2019-11-12 Under Armour, Inc. Shoe with lattice structure
ES2525404A1 (en) * 2013-06-20 2014-12-22 Analco Auxiliar Calzado, S.A. Template for footwear and its manufacturing process (Machine-translation by Google Translate, not legally binding)
US10939723B2 (en) 2013-09-18 2021-03-09 Ossur Hf Insole for an orthopedic device
US9839550B2 (en) 2013-09-25 2017-12-12 Ossur Hf Orthopedic device
US9744065B2 (en) 2013-09-25 2017-08-29 Ossur Hf Orthopedic device
US9839548B2 (en) 2013-09-25 2017-12-12 Ossur Iceland Ehf Orthopedic device
US9839549B2 (en) 2013-09-25 2017-12-12 Ossur Iceland Ehf Orthopedic device
US10646368B2 (en) 2013-09-25 2020-05-12 Ossur Hf Orthopedic device
US10993826B2 (en) 2013-09-25 2021-05-04 Ossur Iceland Ehf Orthopedic device
US9668907B2 (en) 2013-09-25 2017-06-06 Ossur Iceland Ehf Orthopedic device
US10058143B2 (en) 2013-12-12 2018-08-28 Ossur Hf Outsole for orthopedic device
US10045590B2 (en) 2014-02-12 2018-08-14 Soxsols, Llc Insole for footwear
US9560896B1 (en) 2014-02-12 2017-02-07 Soxsols, Llc Insole for footwear
USD776289S1 (en) 2014-03-27 2017-01-10 Ossur Hf Shell for an orthopedic device
USD776288S1 (en) 2014-03-27 2017-01-10 Ossur Hf Shell for an orthopedic device
USD772418S1 (en) 2014-03-27 2016-11-22 Ossur Hf Shell for an orthopedic device
US10391211B2 (en) 2015-01-26 2019-08-27 Ossur Iceland Ehf Negative pressure wound therapy orthopedic device
US10750820B2 (en) 2015-05-08 2020-08-25 Under Armour, Inc. Midsole lattice with hollow tubes for footwear
US10702012B2 (en) 2015-05-08 2020-07-07 Under Armour, Inc. Footwear midsole with lattice structure formed between platforms
US10258111B2 (en) * 2015-09-15 2019-04-16 Pregis Innovative Packaging Llc Inflatable shoe insert
US20170071292A1 (en) * 2015-09-15 2017-03-16 Pregis Innovative Packaging Llc Inflatable shoe insert

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